Updating 1.18 release notes with beta 3

Author: VesaJuvonen

docs/spfx/release-1.18.md

@@ -1,7 +1,7 @@
 ---
 title: SharePoint Framework v1.18 preview release notes
 description: Release notes for the SharePoint Framework v1.18 preview release
-ms.date: 06/28/2023
+ms.date: 08/08/2023
 ms.localizationpriority: high
 ---
 # SharePoint Framework v1.18 preview release notes
@@ -10,6 +10,8 @@ This release
 
 [!INCLUDE [spfx-release-beta](../../includes/snippets/spfx-release-beta.md)]
 
+beta.3 **Released**: July 24, 2023
+beta.2 **Released**: July 18, 2023
 beta.1 **Released**: June 28, 2023
 
 [!INCLUDE [spfx-release-notes-common](../../includes/snippets/spfx-release-notes-common.md)]